Ok Meg$$...I see a few problems as to why you are having troubles with limewire..
1. McAfee, you will need to follow the advice of this poster...
http://www.gnutellaforums.com/258193-post45.html
2. Your Router has a Nat Firewall and you will need to Port forward...
These are your instructions...
Port Forwarding for the Netgear WPN824v2
3. Your ISP (Comcast are known to block certain ports, but port forwarding may fix this)...
